Whitehall Tunnel
The 493rd longest tunnel in the world
The Whitehall Tunnel in Allegheny County, Pennsylvania was originally built by the B&O Railroad in 1899 as a double-track tunnel. The tunnel was completed in 1900. It was part of the Baltimore and Ohio Short Line Railroad, and allowed the B&O to bypass its former route into Pittsburgh along the Pittsburgh Southern and Little Saw Mill Run Railroad. One worker, Antonio De Bono, was killed during its construction. It is currently a single-track tunnel, owned by the Allegheny Valley Railroad. The tunnel is approached from Glenwood in the south, up a steep grade along the Streets Run valley to the northern end of the tunnel. The line continues from the southern end to Bruceton, Pennsylvania. Dimensions: 28 ft wide (8.5 m) at base; 30 ft wide (9.1 m) at spring line; 23 ft (7.0 m) from top of rail to top of arch rise Engineer: W. T. Manning; Bennet & Talbot, subcontractor, 1901–02
Tunnel data from Wikidata (CC0). Summary from Wikipedia (CC BY-SA).